{% if site.google_analytics %}
<script>
    (function(w,d,s,l,i){
        w[l]=w[l]||[];
        w[l].push({'gtm.start':
            new Date().getTime(),event:'gtm.js'});
        var f=d.getElementsByTagName(s)[0],
            j=d.createElement(s),
            dl=l!='dataLayer'?'&l='+l:'';
        j.async=true;
        j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;
        f.parentNode.insertBefore(j,f);
    })(window,document,'script','dataLayer','{{site.google_analytics}}');
</script>
{% endif %}
